Earnings (Loss) Per Share (Details) (USD $) In Millions, except Per Share data	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Earnings Per Share [Abstract]
Net Income (Loss)	$ 198	$ 467	$ (120)	$ 211
Weighted Average Number of Shares Outstanding, Basic	838	834	838	833
Incremental Common Shares Attributable to Share-based Payment Arrangements	6	8	0	9
Weighted Average Number of Shares Outstanding, Diluted	844	842	838	842
Earnings Per Share, Basic	$ 0.24	$ 0.56	$ (0.14)	$ 0.25
Earnings Per Share, Diluted	$ 0.23	$ 0.55	$ (0.14)	$ 0.25
Antidilutive common stock equivalents excluded from diluted earnings (loss) per share	25	23	31	22
Plan Of Reorganization Common Stock Shares Reserved For Issuance To Holders Of Allowed General Unsecured Claims			9
Business Acquisition Equity Interest Reserved For Issuance	1		1

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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